Zip Code 21403 — Annapolis, MD
21403 is a ZIP Code associated with Annapolis, MD, located within Anne Arundel. 21403 ranks #8 out of 37 ZIP codes in Anne Arundel County by population (and #74 out of 477 in MD). The area supports an estimated population of 32,681 residents across Data Pending housing units, with a population density of 1,359.8 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (38.944330, -76.492960)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 21403 |
| Primary City | Annapolis |
| State / Province | MD |
| County | Anne Arundel |
| Total Population | 32,681 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 1,359.8 people/sq mi |
| Timezone | America/New_York |
How 21403 Compares
| Metric | ZIP 21403 | Anne Arundel County | MD State Average |
|---|
| Population | 32,681 | 611,016 (Total) | 6,205,597 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 1,359.8 /sq mi | -- | -- |
| County Pop Rank | #8 of 37 | -- | -- |
Nearby ZIP Codes
Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →